Measurements:
°C
°F
Alajuela
58°F
SW 6 mph
Feels like: 56°F
Precip: 0%
World Resorts Costa Rica Alajuela Weather

Alajuela Sea Water Temperature

Current Sea Water Temperature:
+88.2°F
Maximum Sea Water Temperature in February: 91.8°F
Minimum Sea Water Temperature in February: 85.4°F
Average water temperature in February: 87.9°F

Sea Water Temperature for the Last 10 Days:

February 18 88.2°F February 13 88.0°F
February 17 88.6°F February 12 87.6°F
February 16 88.2°F February 11 86.0°F
February 15 88.0°F February 10 86.2°F
February 14 88.2°F February 09 87.4°F

When is the Warmest Sea for Alajuela?

According to our data for the last three years for Alajuela the highest average sea water temperature was in April, May and March.

Average Water Temperature by Month, °F

Sea Water Temperature in April

Select Year: 2025 2024 2023

The average sea surface temperature in April 2025 for Alajuela was 90.5°F. The maximum and minimum values were 89.8°F and 91.2°F respectively.

Sea Water Temperature in May

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Alajuela was 89.8°F. The maximum and minimum values were 88.8°F and 90.8°F respectively.

Sea Water Temperature in March

Select Year: 2025 2024 2023

The average sea surface temperature in March 2025 for Alajuela was 89.5°F. The maximum and minimum values were 88.4°F and 90.4°F respectively.

Best Time to Visit Alajuela
The most sunny months:
February 17 days
March 16 days
January 15 days
The most warm months:
March 87.4 °F
April 86.5 °F
February 85.9 °F
Warmest sea temperature:
April 89.1 °F
May 88.8 °F
March 88.5 °F
The most cold months:
October 78.7 °F
November 78.8 °F
September 80.0 °F
The most rainy months:
October 25 days
June 25 days
September 25 days
The most windy months:
February 6 mph
January 6 mph
March 6 mph

Alajuela on the Weather Map

Costa Rica Resorts:
NAME
Alajuela +58
Cahuita +72
Cartago +54
Jaco +78
Limon +72
Playa Flamingo +76
Playas del Coco +76
Puerto Limon +72
Puerto Viejo de Talamanca +72
Quepos +68
Samara +78
San Jose +54
Santa Teresa +78
Tamarindo +76
Tortuguero +72
24 Hours Weather Forecast
Alajuela
Local time: 06:51
18 feb, wednesday
0900 80°F
SW
6 mph
1200 86°F
SW
7 mph
1500 76°F
W
0 mph
1800 68°F
SW
4 mph
2100 60°F
SW
4 mph
19 feb, thursday
0000 58°F
SW
5 mph
0300 58°F
SW
5 mph
0600 58°F
SW
5 mph